The file nv4_disp.dll is not digitally signed, which means that it has not been tested by Microsoft's Windows Hardware Quality Labs (WHQL). You may be able to get a WHQL logo'd driver from the hardware manufacturer. To test DirectDraw functionality, click the "Test DirectDraw" button above. To test Direct3D functionality, click the "Test Direct3D" button above. im running a pci express 7600 gs... i get this when i check dxidiag command.